Anion Exchange Membrane Water Electrolyzers (AEMWE) hold the promise of combining the advantages of both liquid alkaline and PEM technologies, offering higher purity hydrogen production, improved efficiency, and dynamic behaviour. Nevertheless, AEM systems face notable challenges, particularly in enhancing the ion conductivity and stability of the membrane. The alkaline chemical stability of the AEMs is, in particular, one of the biggest issues, giving the high alkaline solutions used as electrolyte. To overcome those problems, here in this work, the strategy chosen is the simple addition of an inorganic filler in the polymer matrix of the membrane. Various amounts of Graphene Oxide (GO), synthesized using the modified Hummers method, were incorporated into Fumion-based membranes. The resulting AEMs shows improved water uptake, chemical stability, thermal stability and, with the right amount of filler, also enhanced conductivity. In particular, all the composite membranes show diminished weight loss and I.E.C. loss after 170 h in 6 M KOH at 80 degrees C. The Fumion-GO AEM with 3 %GO (wt%) shows improved conductivity and a remarkable current density higher than 1 A/cm2 at 2 V and 60 degrees C in the chronoamperometric test.

Composite anion exchange membranes based on graphene oxide for water electrolyzer applications / Carboni, Nicholas; Mazzapioda, Lucia; Caprì, Angela; Gatto, Irene; Carbone, Alessandra; Baglio, Vincenzo; Navarra, MARIA ASSUNTA. - In: ELECTROCHIMICA ACTA. - ISSN 0013-4686. - 486:(2024), pp. 1-8. [10.1016/j.electacta.2024.144090]

Composite anion exchange membranes based on graphene oxide for water electrolyzer applications

Nicholas Carboni;Lucia Mazzapioda;Maria Assunta Navarra
2024

Abstract

Anion Exchange Membrane Water Electrolyzers (AEMWE) hold the promise of combining the advantages of both liquid alkaline and PEM technologies, offering higher purity hydrogen production, improved efficiency, and dynamic behaviour. Nevertheless, AEM systems face notable challenges, particularly in enhancing the ion conductivity and stability of the membrane. The alkaline chemical stability of the AEMs is, in particular, one of the biggest issues, giving the high alkaline solutions used as electrolyte. To overcome those problems, here in this work, the strategy chosen is the simple addition of an inorganic filler in the polymer matrix of the membrane. Various amounts of Graphene Oxide (GO), synthesized using the modified Hummers method, were incorporated into Fumion-based membranes. The resulting AEMs shows improved water uptake, chemical stability, thermal stability and, with the right amount of filler, also enhanced conductivity. In particular, all the composite membranes show diminished weight loss and I.E.C. loss after 170 h in 6 M KOH at 80 degrees C. The Fumion-GO AEM with 3 %GO (wt%) shows improved conductivity and a remarkable current density higher than 1 A/cm2 at 2 V and 60 degrees C in the chronoamperometric test.
2024
anion exchange membrane; graphene oxide; water electrolysis; fumion; alkaline stability; enhanced performance
01 Pubblicazione su rivista::01a Articolo in rivista
Composite anion exchange membranes based on graphene oxide for water electrolyzer applications / Carboni, Nicholas; Mazzapioda, Lucia; Caprì, Angela; Gatto, Irene; Carbone, Alessandra; Baglio, Vincenzo; Navarra, MARIA ASSUNTA. - In: ELECTROCHIMICA ACTA. - ISSN 0013-4686. - 486:(2024), pp. 1-8. [10.1016/j.electacta.2024.144090]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1721978
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